Automatic window opening and closing device.



L. 0. KEMP.

AUTOMATIC WINDOW OPENINGYAND CLOSING DEVICE.

. ABPLIOATION FILED MAY 9, 1908.

918,163, Patented Apr.13,1 909.

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20 \0 H l4 l2 bf the United States, residing at Crank, in the i UNITED STATES PATENT Enron.

, LEE 0. KEMP, or CRANK, ARKANSAS:

AUTOMATIC. WINDOW QPENING-iAND CLOSING DE VICE.

Specification of Letters Patent.

Patented April 13,1909.

Application filed may 9, 1908. Serial No. 431,869.

, To ell-whom it may concern} Y 7 Be it known that I, LEE 0. KEMP, a citizen county of Miller; State of Arkansas, have inventedcertain new and. useful Improvements in Automatic Window Opening and. Closing Devices; and I do hereby declare the following to' be a full, clear,and exact dey scription of the invention, such as'will enableothersskilledin the art to which it apper- .tains to make and use the same. v

This invention relates to an automatic window opening and closing device. The object of my invention is to provide an automatic device for regulating the temperature of a room, hall or housing, controlling the source of ventilation, and thereby directly regulating temperature.

In the accompanying drawings, Figure '1 discloses a window equipped with myautomatic ventilating device, showing the window closed. Fi '2 discloses the window as opened by te ventilating mechanism. Fig. 3 shows an enlarged detached detail of .the operating mechanism, and Fig. 4 a central sectional view thereof.

I In carrying out the object of my invention,

I employa simple mechanical means to 1'0- tate a shaft, connected to-a window to openand close the same. In the, accompanying drawings, 5, 5, represents an ordinary window frame, having the two movable sashes 6 v and 7 These window sashes are preferably connected to accurately counterbalance one another, though ifdesired each window may be separately counterbalanced. ,At a.suit

able point I secure to thewindow' frame a base'10, secured bymeans'of the screws 11 to immovably secure this base plate; Striding this base plate 10 is a spider 12' secured by means of the screws 13-,this spider havin'g a central collar 14 carrying the 'set screw 15. Heldwithin the'collar 14 is a slotted plug 16 screw 15.. Fixed-within the slot of this plug 16 is an involute' compensation stri 20 preferably made of two metals having diiferent degrees of. expansion under the same temperature, as brass and steel. At its ends 'stems22 and 23.

Suitably secured -between the window frame or withina suitable housing are the 7 bearing plates 25, 25 as-shown in Fig. 4 each this expansion strip is forked to provide the secured withinthe collar by means of'the set being provided with a ball race 26 to receivesuitableballs, supporting the conical 31 suitably secured thereto and is revolubly held within its bearings.

1 positioned immediately below the plug. 16 and between the forked ends of the involute expansion strips 20., Held within the slot 30 and wound about the end of .theshaft 29 is a strand 35, one end of which strand is secured while the other end of the strand is secured to the end 23 of said strip. Wound about the drum 31, which has been described as secured to this shaft 29, is a strand 37, one

will operate the strand 37 to carry the end38 upward While permitting the end 39 to drop downward, this window 7 to which the end 39 is connected being-preferably a little heavier than its counterpoise so that this insuring the lower window being raised while the up er window is lowered, thereby directly regu ating the-temperature. Y

'The device is simple of construction and positive of operation, and the shaft 29 is ment of the forked end of the expansion strip.

vention, what I claim as new and desire to secure by U. S. Letters Patent is' balance therefor, a shaft, a strand .wound aboutsaid shaft and connected at one end to hubs 2-7 which are screwed upon the threaded shaft 29 which has its forward end slotted as' is shown at 30. This shaft carries the drumvto the-end 22 of the compensation strip as this shaft carries the drum 3]. this drum sash 7 Will-normally gravitate downward,-

pnom'ptly responsive to the swaying movesaid'sash and at the other end to said coun? terbalance, a spider, an involute expansion As shown in Figs'l and 3, the shaft 29 is end 38 of which is secured to the lower-wine .."10 0 And having thus described my said in- 1'. In combination with a sash; a counter- 1 balanced sashes, of a shaft, a cord passing strip secured to said spider ending in a fork, carried by said spider and a }pliable connec- 10 and a liable connection secured to the ends tion wound about said sh: ft iaving its ends of saic fork and wound about said shaft. 1 secured to said fork, all arranged as set forth.

2. The combination with two counteri lntestirnony whereof, I affix my signs-- t-ure, in presence of two Witnesses.

over said shaft and having its endssecured 7 I LEE 0. KEMP. to said two sashes, a suitably secured spider, VVitne'sses: a plug adjustably carried by said spider, an LACY D. TERRELL,- involute expansion strip .v ending in a fork E. P,- WILL IAMS. 

